On 2016-08-03 at 17:46 Barret Rhoden <[email protected]> wrote: > I think we'll need to do more to block perf tools properly. Linux > should be checking CPUID.01H:ECX.PDMC[bit 15] before using > IA32_PERF_CAPABILITIES. So we can zero out that bit from cpuid, then > probably not even let them access the MSR here.
There's also http://sandpile.org/x86/cpuid.htm#level_0000_000Ah, which covers the perfmon version (0xff of eax). This is actually what Akaros uses for detecting Intel's perf capabilities. So we should probably return 0 for that cpuid query too. Barret -- You received this message because you are subscribed to the Google Groups "Akaros" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/d/optout.
